Advanced signal processors for interference cancellation in baseband receivers
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04B-001/10
H04L-001/00
H04L-025/08
출원번호
UP-0204606
(2005-08-15)
등록번호
US-7787572
(2010-09-20)
발명자
/ 주소
Scharf, Louis L.
Nagarajan, Vijay
출원인 / 주소
Rambus Inc.
대리인 / 주소
Barcelo & Harrison, LLP
인용정보
피인용 횟수 :
89인용 특허 :
133
초록▼
A multi-mode receiver includes a channel decomposition module (e.g., a Rake receiver) for separating a received signal into multipath components, an interference selector for selecting interfering paths and subchannels, a synthesizer for synthesizing interference signals from selected subchannel sym
A multi-mode receiver includes a channel decomposition module (e.g., a Rake receiver) for separating a received signal into multipath components, an interference selector for selecting interfering paths and subchannels, a synthesizer for synthesizing interference signals from selected subchannel symbol estimates, and an interference canceller for cancelling selected interference in the received signal. At least one of the channel decomposition module, the synthesizer, and the interference canceller are configurable for processing multi-mode signals.
대표청구항▼
The invention claimed is: 1. A multi-mode receiver, comprising: a channel decomposition module configured for performing a decomposition of a communication channel into a plurality of subchannels; a baseband receiver comprising an upstream baseband processor and a downstream baseband processor; and
The invention claimed is: 1. A multi-mode receiver, comprising: a channel decomposition module configured for performing a decomposition of a communication channel into a plurality of subchannels; a baseband receiver comprising an upstream baseband processor and a downstream baseband processor; and an interference canceller coupled between the upstream baseband processor and the downstream baseband processor; wherein at least one of the channel decomposition module, the baseband receiver, and the interference cancellation system is configurable for processing multi-mode signals; an interference selector coupled to the downstream baseband processor and configured for selecting subchannels that are likely to contribute interference to at least one signal of interest, for producing at least one selected interference symbol; a synthesizer configured to synthesize a synthesized interference signal from the at least one selected interference symbol; a channel emulator configured to produce an estimated interference signal from the synthesized interference signal; a second upstream baseband processor coupled to the channel emulator and configured for producing an estimated received interference signal from the estimated interference signal; and a canceller configured for orthogonally or obliquely projecting a signal output from the baseband receiver onto a subspace that is orthogonal or oblique to a subspace of the estimated received interference signal. 2. The receiver recited in claim 1, wherein the synthesizer is configured for producing a linear combination of synthesized interference signals. 3. The receiver recited in claim 1, wherein the interference selector is configured to recursively determine subsets of channels that may be used in subtractions or in projections of increasing dimension. 4. The receiver recited in claim 1, wherein the interference canceller comprises a subtractive canceller. 5. The receiver recited in claim 1, wherein the baseband receiver further comprises a receiver filter matched to a transmit filter. 6. The receiver recited in claim 1, wherein the channel decomposition module includes a physical channel identification module configured to estimate a multipath profile. 7. The receiver recited in claim 1, wherein the multi-mode signals include at least one of a set of signals, including signals corresponding to multiple transmission protocols, signals corresponding to multiple variations of a particular transmission protocol, and signals corresponding to multiple receiver signal-processing techniques. 8. The receiver recited in claim 1, wherein the interference canceller is configured to process a sequence of estimated symbols. 9. The receiver recited in claim 1, wherein at least one of the synthesizer, the channel emulator, and the second upstream baseband processor is configured to synchronize the estimated received interference signal with the signal output from the baseband receiver. 10. The receiver recited in claim 1, wherein the channel decomposition module is configured to track signals that are identified as at least one of strong sources and strong multi path components. 11. The receiver recited in claim 1, wherein the baseband receiver comprises a Rake receiver and an equalizer, the baseband receiver being configured for selecting at least one of the Rake receiver and the equalizer for processing a received baseband signal. 12. The receiver recited in claim 1 configured to operate in at least one of a transmit diversity system and a receive-diversity system. 13. The receiver recited in claim 1, wherein the interference canceller includes an interference-cancelled signal combiner. 14. The receiver recited in claim 13, wherein the interference-cancelled signal combiner is configured to combine the outputs over a plurality of subchannels and multi paths. 15. The receiver recited in claim 13, wherein the interference-cancelled signal combiner is configured to perform at least one of Maximal Ratio Combining, Equal Gain Combining, Minimum Mean Squared Error Combining, Minimum Variance Unbiased Combining, and Selection Combining. 16. The receiver recited in claim 1, configured to operate in at least one of a base station and a handset. 17. The receiver recited in claim 1 integrated in a chipset. 18. The receiver recited in claim 1, wherein at least one of the channel decomposition module, the baseband receiver, and the interference cancellation system is configurable for processing a plurality of signal types of a set of signals, the set including GSM signals, CDMA signals, W-CDMA signals, and OFDM signals. 19. The receiver recited in claim 1, wherein at least one of the channel decomposition module, the baseband receiver, and the interference cancellation system is configurable for processing a plurality of signal types of a set of signals, the set including CDMA signals, W-CDMA signals, and OFDM signals. 20. An interference cancellation system configurable to operate in a multi-mode receiver, comprising: a means for performing decomposition of a communication channel into a plurality of subchannels; a means for performing baseband processing, comprising a means for performing upstream baseband processing and a means for performing downstream baseband processing; and a means for canceling interference; wherein at least one of the means for performing decomposition, the means for performing baseband processing, and the means for canceling interference is configurable for processing multi-mode signals; a means for selecting subchannels that are likely to contribute interference to at least one signal of interest, for producing at least one selected interference symbol; a means for synthesizing a synthesized interference signal from the at least one selected interference symbol; a means for performing channel emulation to produce an estimated interference signal from the synthesized interference signal; a second means for performing upstream baseband processing to produce an estimated received interference signal from the estimated interference signal; and a means for orthogonally or obliquely projecting a signal output from the means for performing baseband processing onto an interference subspace of the estimated received interference signal. 21. The interference cancellation system recited in claim 20, wherein the means for synthesizing further comprises at least one means for compensating for multipath delay in a received baseband signal. 22. The interference cancellation system recited in claim 20, further comprising a means for producing a linear combination of synthesized interference signals. 23. The interference cancellation system recited in claim 20, wherein the means for orthogonally or obliquely projecting includes at least one of a means for performing orthogonal projection and a means for performing oblique projection. 24. The interference cancellation system recited in claim 20, wherein the means for selecting is configured to recursively determine subsets of channels that may be used in subtractions or in projections of increasing dimension. 25. The interference cancellation system recited in claim 20, wherein the means for synthesizing further comprises a means for imparting a delay to the at least one estimated interference signal in order to synchronize the at least one synthesized interference signal with a received baseband signal. 26. The interference cancellation system recited in claim 20, wherein the means for selecting includes a means for combining outputs from the means for canceling. 27. The interference cancellation system recited in claim 26, wherein the means for combining outputs is configured to combine the outputs over a plurality of subchannels and multi paths. 28. The interference cancellation system recited in claim 26, wherein means for combining outputs is configured to perform at least one of Maximal Ratio Combining, Equal Gain Combining, Minimum Mean Squared Error Combining, Minimum Variance Unbiased Combining, and Selection Combining. 29. The interference cancellation system recited in claim 20, wherein the multi-mode signals include at least one of a set of signals, including signals corresponding to multiple transmission protocols, signals corresponding to multiple variations of a particular transmission protocol, and signals corresponding to multiple receiver signal-processing techniques. 30. The interference cancellation system recited in claim 20, wherein the means for canceling interference is configured to process sequences of estimated symbols. 31. The interference cancellation system recited in claim 20 configured to operate in at least one of a transmit-diversity system and a receive-diversity system. 32. The interference cancellation system recited in claim 20, wherein the means for performing baseband processing comprises a means for performing Rake reception and a means for equalizing, the means for performing baseband processing being configured for selecting at least one of the means for performing Rake reception and the means for equalizing for processing a received baseband signal. 33. The interference cancellation system recited in claim 20, wherein at least one of the means for performing decomposition, the means for performing baseband processing, and the means for canceling interference is configurable for processing a plurality of signal types of a set of signals, the set including GSM signals, COMA signals, WCOMA signals, and OFOM signals. 34. The interference cancellation system recited in claim 20, wherein at least one of the means for performing decomposition, the means for performing baseband processing, and the means for canceling interference is configurable for processing a plurality of signal types of a set of signals, the set including CDMA signals, W-COMA signals, and OFOM signals. 35. A handset, comprising: a channel decomposition module configured for performing a decomposition of a communication channel into a plurality of subchannels; a baseband receiver comprising an upstream baseband processor and a downstream baseband processor; and an interference canceller coupled between the upstream baseband processor and the downstream baseband processor; wherein at least one of the channel decomposition module, the baseband receiver, and the interference cancellation system is configurable for processing multi-mode signals; an interference selector coupled to the downstream baseband processor and configured for selecting subchannels that are likely to contribute interference to at least one signal of interest, for producing at least one selected interference symbol; a synthesizer configured to synthesize a synthesized interference signal from the at least one selected interference symbol; a channel emulator configured to produce an estimated interference signal from the synthesized interference signal; a second upstream baseband processor coupled to the channel emulator and configured for producing an estimated received interference signal from the estimated interference signal; and a canceller configured for orthogonally or obliquely projecting a signal output from the baseband receiver onto a subspace that is orthogonal or oblique to a subspace of the estimated received interference signal. 36. The handset recited in claim 35, wherein the synthesizer is configured for producing a linear combination of synthesized interference signals. 37. The handset recited in claim 35, wherein the interference selector is configured to recursively determine subsets of channels that may be used in subtractions or in projections of increasing dimension. 38. The handset recited in claim 35, wherein the baseband receiver further comprises a combiner configured for combining a plurality of signal outputs from the baseband receiver. 39. The handset recited in claim 35, wherein the interference canceller comprises a subtractive canceller. 40. The handset recited in claim 35, wherein the channel decomposition module includes a physical channel identification module configured to estimate a multipath profile. 41. The handset recited in claim 35, wherein the multi-mode signals include at least one of a set of signals, including signals corresponding to multiple transmission protocols, signals corresponding to multiple variations of a particular transmission protocol, and signals corresponding to multiple receiver signal-processing techniques. 42. The handset recited in claim 35, wherein the interference canceller is configured to process a sequence of estimated symbols. 43. The handset recited in claim 35, wherein at least one of the synthesizer, the channel emulator, and the second upstream baseband processor is configured to synchronize the estimated received interference signal with the signal output from the baseband receiver. 44. The handset recited in claim 35, wherein the channel decomposition module is configured to track signals that are identified as at least one of strong sources and strong multi path components. 45. The handset recited in claim 35, wherein the baseband receiver comprises a Rake receiver and an equalizer, the baseband receiver being configured for selecting at least one of the Rake receiver and the equalizer for processing a received baseband signal. 46. The handset recited in claim 35, configured to operate in at least one of a transmit diversity system and a receive-diversity system. 47. The handset recited in claim 35, wherein the interference canceller includes an interference-cancelled signal combiner. 48. The handset recited in claim 47, wherein the interference-cancelled signal combiner is configured to combine the outputs over a plurality of subchannels and multi paths. 49. The handset recited in claim 47, wherein the interference-cancelled signal combiner is configured to perform at least one of Maximal Ratio Combining, Equal Gain Combining, Minimum Mean Squared Error Combining, Minimum Variance Unbiased Combining, and Selection Combining. 50. The handset recited in claim 35, wherein at least one of the channel decomposition module, the baseband receiver, and the interference cancellation system is configurable for processing a plurality of signal types of a set of signals, the set including GSM signals, CDMA signals, W-CDMA signals, and OFDM signals. 51. The handset recited in claim 35, wherein at least one of the channel decomposition module, the baseband receiver, and the interference cancellation system is configurable for processing a plurality of signal types of a set of signals, the set including CDMA signals, W-CDMA signals, and OFDM signals. 52. A chipset, comprising: a channel decomposition module configured for performing a decomposition of a communication channel into a plurality of subchannels; a baseband receiver comprising an upstream baseband processor and a downstream baseband processor; and an interference canceller coupled between the upstream baseband processor and the downstream baseband processor; wherein at least one of the channel decomposition module, the baseband receiver, and the interference cancellation system is configurable for processing multi-mode signals; an interference selector coupled to the downstream baseband processor and configured for selecting subchannels that are likely to contribute interference to at least one signal of interest, for producing at least one selected interference symbol; a synthesizer configured to synthesize a synthesized interference signal from the at least one selected interference symbol; a channel emulator configured to produce an estimated interference signal from the synthesized interference signal; a second upstream baseband processor coupled to the channel emulator and configured for producing an estimated received interference signal from the estimated interference signal; and a canceller configured for orthogonally or obliquely projecting a signal output from the baseband receiver onto a subspace that is orthogonal or oblique to a subspace of the estimated received interference signal. 53. The chipset recited in claim 52, wherein the synthesizer is configured for producing a linear combination of synthesized interference signals. 54. The chipset recited in claim 52, wherein the interference selector is configured to recursively determine subsets of channels that may be used in subtractions or in projections of increasing dimension. 55. The chipset recited in claim 52, wherein the baseband receiver further comprises a combiner configured for combining a plurality of signal outputs from the baseband receiver. 56. The chipset recited in claim 52, wherein the interference canceller comprises a subtractive canceller. 57. The chipset recited in claim 52, wherein the channel decomposition module includes a physical channel identification module configured to estimate a multipath profile. 58. The chipset recited in claim 52, wherein the multi-mode signals include at least one of a set of signals, including signals corresponding to multiple transmission protocols, signals corresponding to multiple variations of a particular transmission protocol, and signals corresponding to multiple receiver signal-processing techniques. 59. The chipset recited in claim 52, wherein the interference canceller is configured to process a sequence of estimated symbols. 60. The chipset recited in claim 52, wherein at least one of the synthesizer, the channel emulator, and the second upstream baseband processor is configured to synchronize the estimated received interference signal with the signal output from the baseband receiver. 61. The chipset recited in claim 52, wherein the channel decomposition module is configured to track signals that are identified as at least one of strong sources and strong multipath components. 62. The chipset recited in claim 52, wherein the baseband receiver comprises a Rake receiver and an equalizer, the baseband receiver being configured for selecting at least one of the Rake receiver and the equalizer for processing a received baseband signal. 63. The chipset recited in claim 52 configured to operate in at least one of a transmit-diversity system and a receive-diversity system. 64. The chipset recited in claim 52, wherein the interference canceller includes an interference-cancelled signal combiner. 65. The chipset recited in claim 64, wherein the interference-cancelled signal combiner is configured to combine the outputs over a plurality of subchannels and multipaths. 66. The chipset recited in claim 64, wherein the interference-cancelled signal combiner is configured to perform at least one of Maximal Ratio Combining, Equal Gain Combining, Minimum Mean Squared Error Combining, Minimum Variance Unbiased Combining, and Selection Combining. 67. The chipset recited in claim 52, wherein at least one of the channel decomposition module, the baseband receiver, and the interference cancellation system is configurable for processing a plurality of signal types of a set of signals, the set including GSM signals, CDMA signals, W-CDMA signals, and OFDM signals. 68. The chipset recited in claim 52, wherein at least one of the channel decomposition module, the baseband receiver, and the interference cancellation system is configurable for processing a plurality of signal types of a set of signals, the set including CDMA signals, W-CDMA signals, and OFDM signals.
Chiba Isamu (Nara JPX) Fujise Masayuki (Nara JPX), Apparatus for controlling array antenna comprising a plurality of antenna elements and method therefor.
Zhodzishsky Mark I.,RUX ; Vorobiev Michail Y.,RUX ; Prasolov Victor A.,RUX ; Ashjaee Javad, Apparatuses and methods of suppressing a narrow-band interference with a compensator and adjustment loops.
Dogan Mithat Can ; Stearns Stephen Deane, Communication apparatus for transmitting and receiving signals over a fiber-optic waveguide using different frequency bands of light.
Tsujimoto Ichiro (Tokyo JPX), Decision feedback equalizer including forward part whose signal reference point is shiftable depending on channel respon.
Cochran Bruce A. (Mesa AZ) Liebetreu John M. (Scottsdale AZ) McCallister Ronald D. (Scottsdale AZ), Demodulator with selectable coherent and differential data.
Cochran Bruce A. (Mesa AZ) McCallister Ronald D. (Scottsdale AZ) Garvey Brendan J. (Scottsdale AZ), Differential/coherent digital demodulator operating at multiple symbol points.
Janc Robert V. (Palos Heights IL) Jasper Steven C. (Hoffman Estates IL) Longley Lester A. (Chicago IL) Zebrose Katherine L. (Chicago IL) Turney William J. (Schaumburg IL) Lillie Ross J. (Schaumburg I, Digital radio frequency receiver.
Mohamed Moataz A., Digital signal processor configuration including multiplying units coupled to plural accumlators for enhanced parallel mac processing.
Gilhousen Klein S. (San Diego CA) Padovani Roberto (San Diego CA) Wheatly ; III Charles E. (Del Mar CA), Diversity receiver in a CDMA cellular telephone system.
Dean Richard F. (Boulder CO) Antonio Franklin P. (Del Mar CA) Gilhousen Klein S. (Bozeman MT) Wheatley ; III Charles E. (Del Mar CA), Dual distributed antenna system.
Dean Richard F. (Escondido CA) Antonio Franklin P. (Del Mar CA) Gilhousen Klein S. (Bozeman MT) Wheatley ; III Charles E. (Del Mar CA), Dual distributed antenna system.
Upadhyay Triveni N. ; VanderVelde Wallace E. ; Falcone Kenneth A., Integrated adaptive spatial-temporal system for controlling narrowband and wideband sources of interferences in spread spectrum CDMA receivers.
van Heeswyk Frank Martin,CAX ; Newson Paul,CAX, Interference cancellation system and method and CDMA receiver including an interference cancellation circuit.
Tanaka Yoshinori,JPX ; Kobayakawa Shuji,JPX ; Seki Hiroyuki,JPX ; Toda Takeshi,JPX ; Tsutsui Masafumi,JPX, Interference canceller equipment and interference cancelling method for use in a multibeam-antenna communication system.
Young Shane Michael Joseph,CAX ; Bongfeldt David Charles,CAX, Interference canceller for the protection of direct-sequence spread-spectrum communications from high-power narrowband interference.
Nir Joseph,ILX ; Shayevich Baruch,ILX ; Cohen Hanoch,ILX ; Perelmuter Oleg,ILX, Locating a mobile unit using signals from both mobile beacons and stationary beacons.
Rademacher Leo,DEX ; Gardijan Zoran,DEX, Method and apparatus for detecting items of information transmitted according to the DS-CDMA principle in a receiver apparatus.
Arogyaswami J. Paulraj ; Peroor K. Sebastian ; Jose Tellado ; Robert W. Heath, Jr., Method and wireless communications system using coordinated transmission and training for interference mitigation.
Ranta Pekka,FIX ; Jolma Petri,FIX ; Gandini Giulio,FIX ; Honkasalo Zhichun,FIX, Method of allocating frequency bands to different cells, and TDMA cellular radio system.
Roy ; III Richard H. (Cupertino CA) Paulraj Arogyaswami J. (Bangalore CA INX) Kailath Thomas (Stanford CA), Methods and arrangements for signal reception and parameter estimation.
Hafeez Abdulrauf ; Molnar Karl J. ; Bottomley Gregory E., Methods and systems for reducing co-channel interference using multiple timings for a received signal.
Zeger Andrew E. (Wyndmoor PA) Abrams Burton S. (Wyndmoor PA), Multiple signal receiver for direct sequence, code division multiple access, spread spectrum signals.
Divsalar Dariush (Pacific Pallisades CA) Simon Marvin K. (La Canada CA) Raphaeli Dan (Tel Aviv ILX), Parallel interference cancellation for CDMA applications.
Fenton Patrick (Calgary CA CAX) Van Dierendonck Albert J. (Los Altos CA), Pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay s.
Ichikawa Toshihito (Saitama JPX) Kasa Koichi (Saitama JPX) Akiyama Kiichiro (Saitama JPX), Radio receiver having switch for switching between a wide filter and a narrow filter.
Choi Seung Won,KRX ; Yun Dong Un,KRX, Signal processing apparatus and method for reducing the effects of interference and noise in wireless communication systems.
Halpern Peter H. (118 Old Hickory Ct. Longwood FL 32750) Mallory Peter E. (406 N. Riverside Dr. Edgewater FL 32032) Haug Paul E. (5851 Michelle La. Sanford FL 32771) Koos ; Jr. William M. (548 Lake A, System for transmitting data through a troposcatter medium.
Bejjani Elie,FRX ; Bouquier Jean-Fran.cedilla.ois,FRX ; de Cacqueray Benoit,FRX, To a telecommunication system using code division multiple access (CDMA).
Zheng, Dunmin; Karabinis, Peter D., Adaptive beam forming with multi-user detection and interference reduction in satellite communication systems and methods.
Fox, John; Holden, Brian; Hunt, Peter; Keay, John D.; Shokrollahi, Amin; Simpson, Richard; Singh, Anant; Stewart, Andrew Kevin John; Surace, Giuseppe, Methods and systems for chip-to-chip communication with reduced simultaneous switching noise.
Fox, John; Holden, Brian; Hunt, Peter; Keay, John D.; Shokrollahi, Amin; Simpson, Richard; Singh, Anant; Stewart, Andrew Kevin John; Surace, Giuseppe, Methods and systems for chip-to-chip communication with reduced simultaneous switching noise.
Fox, John; Holden, Brian; Hunt, Peter; Keay, John D.; Shokrollahi, Amin; Stewart, Andrew Kevin John; Surace, Giuseppe; Ulrich, Roger; Simpson, Richard, Methods and systems for high bandwidth chip-to-chip communcations interface.
Fox, John; Holden, Brian; Hunt, Peter; Keay, John D.; Shokrollahi, Amin; Stewart, Andrew Kevin John; Surace, Giuseppe; Ulrich, Roger; Simpson, Richard, Methods and systems for high bandwidth chip-to-chip communications interface.
Fox, John; Holden, Brian; Hormati, Ali; Hunt, Peter; Keay, John D.; Shokrollahi, Amin; Simpson, Richard; Singh, Anant; Stewart, Andrew Kevin John; Surace, Giuseppe; Ulrich, Roger, Methods and systems for high bandwidth communications interface.
Fox, John; Holden, Brian; Hormati, Ali; Hunt, Peter; Keay, John D.; Shokrollahi, Amin; Simpson, Richard; Singh, Anant; Stewart, Andrew Kevin John; Surace, Giuseppe; Ulrich, Roger, Methods and systems for high bandwidth communications interface.
Fox, John; Holden, Brian; Shokrollahi, Amin; Singh, Anant; Surace, Giuseppe, Methods and systems for pin-efficient memory controller interface using vector signaling codes for chip-to-chip communication.
Fox, John; Holden, Brian; Shokrollahi, Amin; Singh, Anant; Surace, Giuseppe, Methods and systems for pin-efficient memory controller interface using vector signaling codes for chip-to-chip communications.
Holden, Brian; Shokrollahi, Amin, Methods and systems for selection of unions of vector signaling codes for power and pin efficient chip-to-chip communication.
Holden, Brian; Shokrollahi, Amin; Singh, Anant, Methods and systems for skew tolerance in and advanced detectors for vector signaling codes for chip-to-chip communication.
Holden, Brian; Shokrollahi, Amin; Singh, Anant, Methods and systems for skew tolerance in and advanced detectors for vector signaling codes for chip-to-chip communication.
Holden, Brian; Shokrollahi, Amin; Singh, Anant, Methods and systems for skew tolerance in and advanced detectors for vector signaling codes for chip-to-chip communication.
Stauffer, David R.; Stewart, Andrew Kevin John; Keay, John D., System for generating a test pattern to detect and isolate stuck faults for an interface using transition coding.
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